MSCT AN INTRODUCTION TO A NOVEL TECHNIQUE
Dr. Hazem Abu Zeid YousefLecturer of Radiodiagnosis
Faculty of MedicineAssiut University
INTRODUCTION
The introduction of spiral CT in the early 1990s resulted in fundamental and far-reaching improvement of CT imaging.
For the first time volume data could be acquired without mis-registration of anatomical details, which initiated the development of 3D image processing techniques such as multi-planar reformations (MPRs), maximum intensity projections (MIPs), surface-shaded displays (SSDs) or volume renderings.
As an important application CT angiography (CTA) has been established in clinical practice. As a consequence of increasing clinical demands, single-slice spiral CT with 1-s gantry rotation time soon encountered its limitations.
Larger volume coverage and improved transverse resolution can be achieved by simultaneous acquisition of more than one slice and by a shorter gantry rotation time. The first step towards multi-slice acquisition was a two-slice CT scanner introduced
in 1993 (Elscint Twin). In 1998 all major CT manufacturers introduced multi-slice CT systems which brought about considerable improvements of scan speed, transverse resolution and utilization of the
tube output.
SOME CLINICAL APPLICATIONS OF MDCT
MDCT ANGIOGRAPHY
CEREBRAL ANGIOGRAPHY
THORACIC AORTA
ABDOMINAL AORTA
LOWER LIMBARTERIOGRAPHY
PULMONARY ARTERIES
COMPERHENSIVE MSCT OF THE ABDOMEN
TRIPHASIC LIVER STUDY
HEPATOBILIARY SYSTEM
MDCT UROGRAPHY
NORMAL ANATOMY
NORMAL ANATOMY
FRONTAL (ANTERIOR) VIEW OF VR IMAGES
MIP IMAGE (POSTERIOR VIEW) VR DOUBLE DENSITY IMAGE
(POSTERIOR VIEW)
NORMAL VARIANTS AND CONGENITAL ANOMALIES
NORMAL PAPILLARY BLUSH
PROMINENT RENAL PAPILLA
COMPOUND CALYX
PTOTIC KIDNEY
ECTOPIC KIDNEY
VR IMAGE MIP IMAGE
HORSESHOE KIDNEY
DOUPLEX LEFT COLLECTING SYSTEM WITH ECTOPIC UPPER MOIETY URETER
UROLITHIASIS
CASE (1)
NON ENHANCED CT SHOWING BILATERAL RENAL PELVIS CALCULI WITH MARKED PYELITIS.
ENHANCED CT SHOWING GOOD ENHANCEMENT.
MIP; THE STONES ARE WELL-SEEN WITHIN THE OPACIFIED RENAL PELVIS.
CASE (2)
THICK SLAP MIPBILATERAL RENAL AND UB STONES
CORONAL IMAGESSHOWING MARKED PYELITIS OF THE LEFT KIDNEY
MIP; THE STONES ARE WELL-SEEN WITHIN THE OPACIFIED RENAL PELVIS. MULTIPLE UB STONES.
CASE (3)
ACUTELY OBSTRUCTEDLEFT KIDNEY WITH PERINEPHRIC COLLECTION (FORNICEAL RUPTURE).
CURVED REFORMATSSHOWING 3 LOWER URETERIC STONES.
CASE (4)
CURVED REFORMATLOWER URETERIC STONE
CAUSING MILD HYDRONEPHROSIS
DOUBLE DENSITY VR IMAGETHE STONE IS DEMONSTRATED
AGAINST THE UNDERLYINGBONE
CASE (5)
BILHARZIAL CALCIFICATION OF THE LEFT LOWER URETER WITH LOWER URETERIC STONE.
CASE (6)
CASE (7)
CASE (8)
RENAL INFECTIONS
CASE (1)MULTIFOCAL NEPHRONIA
CASE (2)
OBSTRUCTED INFECTED KIDNEYENLARGED LEFT KIDNEY WITH MARKED STRANDING OF THE
PERINEPHRIC FAT AND OBSTRUCTING PELVIC CALCULUS
DOUBLE DENSITY VR IMAGE SHOWING THE OBSTRUCTING CALCULUS
RENAL SOLs
CASE (1)
NON ENHANCED CT ENHANCED CT
DELAYED FILLING OF CALYCEAL DIVERTICULUM
CASE (2)
SIMPLE (BOSNIAK TYPE I) RENAL CYST
CASE (3)
MULTILOCULAR PARAPELVIC CYST WITH STRETCHING OF THE MAJOR CALYCES
CASE (4)
BOSNIOAK TYPE II CYST WITH THIN CALCIFIED RIM AND INTRACYSTIC SEPTUM
(THANKS FOR THE SUBMILLEMETRIC SLICE THICKNESS)
CASE (5)
INITIALLY HYPERDENSE SIMPLE CYST (BOSNIAK TYPE II)
CASE (6)
BOSNIAK TYPE III CYSTTHICK ENHANCING INCOMPLETE
SEPTUM AND IRREGULAR OUTLINES
CASE (7)
BOSNIAK TYPE IV CYSTTHICK ENHANCING MURAL NODULE
CASE (8)
SOLID PARAPELVIC MASS CLEARLY DEMONSTRATED IN CORONAL IMAGES
CASE (9)
MALIGNANT LOWER POLAR LEFT RENAL MASS WITH ENHANCING MALIGNANT THROMBUS WITHIN THE IVC
AND SECONDARY VARICOSITIES OF THE LEFT TESTICULAR VEIN.
CASE (10)
MALIGNAT SUPRARENAL MASSWITH LIVER METASTASES
DISPLACED LEFT KIDNEY WITH DOUPLEX RIGHT COLLECTING SYSTEM
CASE (10)
URETERS
AS A RULE;MALIGNANT URETERIC NEOPLASMS CHARACTERISTICALLY CAUSE DILATATION OF THE URETER BOTH PROXIMAL AND DISTAL TO THE LESION.
CASE (1)
CASE (2)
CASE (3)
CASE (6)
FIBROVASCULAR POLYP OF THE URETER
URINARY BLADDER
CASE (1)
CASE (2)
EXTRAVESICAL PARARECTAL MASS
CASE (3)
RENAL ARTERY ASSESSMENT
SOME SPECIAL TECHNIQUES
CONTRAST ENEMA
MDCT FISTULOGRAPHY
ASSESSMENT OF POLYTRAUMA
FRACTURE MANDIBLE
FRACTURE CX SPINE
FRACTURE L.S.S.
FRACTURE PELVIS
THANK YOUTHANK YOU
